Grinding-disk.



R. A REYNOLDS. GRINDING DISK.

APPLICATION FILED NOV. 30,1914

Patented M51119, 1915.

ESEQ SSQIEF *Wllillllll \HVEHTOR TTOWHY NORRIS PETERS CO., PHOTU-LITHD" WASHINGTON. D. C.

ROBERT A. REYNOLDS, 0? PORT HURON, MICHIGAN.

GRINDING-DISK.

LTELWW.

Specification of Letters Eatent.

Patented Mar. 9, timid.

Application filed November 30, 1914. Serial No. 874,599.

To all whom it may concern Be it known that T, ROBERT A. REYNOLDS, a citizen of the United States, residing at Port Huron, county of St. Clair, State of Michigan, have invented a certain new and useful Improvement in Grinding-Disks, and declare the following to be a full,clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to grinding plates or disks, and has for its object a grinding plate provided with a special arrangement of baffles in the grooves to make the stock rise to the cutting edges of the plate.

in the drawings,Figure 1 is a plan view of a disk. Fig. 2 is an enlarged section on the line A A of Fig. 1. Fig. 3 is an enlarged section taken on practically a radial line the line B B of Fig. 1. Fig. t is an enlarged elevation of the periphery of a portion of a disk.

The grinding disk is divided into a plurality of segments provided with parallel grooves forming parallel ribs a, which are provided with cutting edges. These parallel grooves and ribs are themselves old, as is also the broad idea of using baffles b for causing the stock to rise in the groove so that it may be caught between the cutting edges of the two plates (two plates ordinarily being used together).

My improvement consists in providing a special arrangement of the baffles so as to secure better results in the reduction of the stock. This special form of baffles is clearly shown in Fig. 3, and it can be seen that a part of the cutting edge is flush with the surface of the tops of the ribs or what may be termed the face of the disk while a portion of the top surface of the battle is sloping or beveled. This sloping surface gives a slight space through which the stock may pass over the baflie.

The baffles are not only obliquely arranged with respect to the grooves and the ribs but are staggered in adjacent grooves, and further, alternate battles in the same groove have opposite obliquities. In each case the sloping end of the baffle is the end farther away from the center of the disk and by reason of the opposite obliquities of alternate baflies, the sloping or beveled end of alternate baffles in the same groove are on opposite sides of the groove, hence the stock is caused to take a Zig-zag path while proceeding along the bottom of the groove from the center of the plate to the outside. This zig-Zag or tortuous passage of the stock tends to turn the stock over or twist a column of stock so as to bring all the portions of the face of the disk and expose it to the cutting edges of the disk and baflies, thereby producing as near as may be a uniformity of reduction.

/Vhat I claim is:

1. A grinding plate, having a face provided with a plurality of cutting ribs fornr ing grooves and provided with a plurality of obliquely set baffles beveled at one end and having cutting edges.

2. A grinding plate, having a face provided with a plurality of ribs having cutting edges and forming grooves, and obliquely set battles in the said grooves, provided with beveled ends at the ends toward the outside of the plate.

3. A grinding plate, having a face provided with ribs having cutting edges and forming grooves and baffles in the grooves, the alternate baffles of a groove being disposed with opposite obliquities with respect to the adjacent ribs and the ends of the baffies toward the outside of the plate being beveled, whereby a tortuous passage is formed in a groove.

In testimony whereof, I sign this speciflcation in the presence of two witnesses.

ROBERT A. REYNOLDS.

Witnesses CHARLES L. BENEDICT, FRANK R. WATSON.

tlopier. of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. e. 

